Correlates having a apple touch icon in the web page as a factor.
This factor correlates the presence of an apple touch icon (in the HTML source) with rankings.
This factor correlates the presence of the factor on page and not the amount of that factor.
You can learn more about the targeted zone for this factor at: https://developer.apple.com/library/content/documentation/AppleApplications/Reference/SafariWebContent/ConfiguringWebApplications/ConfiguringWebApplications.html.
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